a FEATURES 4 Complete 12-Bit D/A Functions Double-Buffered Latches Simultaneous Update of All DACs Possible 65 V Output Range High Stability Bandgap Reference Monolithic BiMOS Construction Guaranteed Monotonic over Temperature 3/4 LSB Linearity Guaranteed over Temperature 4 ms max Settling Time to 0.01% Operates with 612 V Supplies Low Power: 720 mW max Including Reference TTL/5 V CMOS Compatible Logic Inputs 8-Bit Microprocessor Interface 24-Pin PDIP or 28-Lead PLCC Package PRODUCT DESCRIPTION The AD75004 contains four complete, voltage output, 12-bit digital-to-analog converters, a high stability bandgap reference, and double-buffered input latches on a single chip. The converters use 12 precision high speed bipolar current steering switches and laser-trimmed thin-film resistor networks to provide fast settling time and high accuracy. Microprocessor compatibility is achieved by the on-chip double-buffered latches. The design of the input latches allows direct interface to 8-bit buses. The 12 bits of data from the first rank of latches can then be transferred to the second rank, avoiding generation of spurious analog output values. The latch responds to strobe pulses as short as 50 ns, allowing use with fast microprocessors. The functional completeness and high performance of the AD75004 results from a combination of advanced switch design, the BiMOS II fabrication process, and proven laser trimming technology. BiMOS II is an epitaxial BiCMOS process optimized for analog and converter functions. The AD75004 is trimmed at the wafer level and is specified to ± 1/2 LSB maximum linearity error at 25°C and ± 3/4 LSB over the full operating temperature range. The on-chip output amplifiers provide an output range of ± 5 V, with 1 LSB equal to 2.44 mV. Quad 12-Bit D/A Converter AD75004 FUNCTIONAL BLOCK DIAGRAM V REFOUT V REFIN +5V 2.22k VOLTAGE REFERENCE INPUT LATCHES 8 + 4-BIT LATCHES DAC LATCHES 12-BIT LATCH 12-BIT DAC 10k 8 + 4-BIT LATCHES 12-BIT LATCH 12-BIT DAC 10k 8 + 4-BIT LATCHES 12-BIT LATCH 12-BIT DAC 10k 8 + 4-BIT LATCHES 12-BIT LATCH 12-BIT DAC 10k V OUT3 D7 D6 D5 D4 D3 D2 D1 D0 TTL INPUTS 8-BIT BUS CONTROL LOGIC TTL INPUTS AD75004 V OUT2 VOUT1 VOUT0 +12V V DD –12V VSS AGND DGND CS WR A3 A2 A1 A0 The bandgap reference on the chip has low noise, long term stability and temperature drift characteristics comparable to discrete reference diodes. The absolute value of the reference is laser trimmed to +5.00 V with 0.6% maximum error. Its temperature coefficient is also laser trimmed. Typical full-scale gain TC is 15 ppm/°C. With guaranteed monotonicity over the full temperature range, the AD75004 is well suited for wide temperature range performance. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 AD75004–SPECIFICATIONS (T = +258C, 612.0 V power supplies unless otherwise noted) A Parameter Symbol Min DIGITAL INPUTS (D0–D7, A0–A3, CS, WR) Logic Levels (TTL Compatible) Input Voltage, Logic “1” Input Voltage, Logic “0” Input Current, VIH = 5.5 V Input Current, VIL = 0.8 V Input Capacitance VIH VIL IIH IIL CIN 2.0 0 ACCURACY Resolution Integral Linearity Error Integral Linearity Error, TMIN to TMAX Differential Linearity Error Differential Linearity Error, TMIN to TMAX Gain (Full-Scale) Error1 Gain Error Drift, TMIN to TMAX1 Bipolar Zero Error1 Bipolar Zero Error Drift, TMIN to TMAX1 Typ DYNAMIC PERFORMANCE Settling Time to ± 0.01% of FSR for FSR Change, 2 kΩ || 500 pF Load Slew Rate, 2 kΩ || 500 pF Load Digital Input Crosstalk (Static)2 VOLTAGE REFERENCE Reference Output Voltage Temperature Coefficient Reference Output Currents3 Reference Input Voltage Reference Input Current @ 5.0 V TEMPERATURE RANGE Specification Storage 5.5 0.8 10 10 10 V V µA µA pF 12 61/2 ± 3/4 63/4 Bits LSB LSB LSB 610 ± 30 62 ±7 LSB ppm/°C LSB ppm/°C ± 1/2 ±1 ±1 61 64 62 LSB LSB LSB 2 4 –50 µs V/µs dB 640 V mA mA 5 VOUT IOUT ±5 VREFOUT 4.97 3.0 4.5 VREFIN IREFIN POWER SUPPLY GAIN SENSITIVITY ∆Gain/∆VDD, VDD = +10.8 to +13.2 V dc1 ∆Gain/∆VSS, VSS = –10.8 to –13.2 V dc1 POWER SUPPLY REQUIREMENTS Voltage Range Supply Currents Units ± 1/4 ± 1/2 ± 1/2 Guaranteed Monotonic ±2 ± 15 ±1 ±3 CHANNEL-TO-CHANNEL MISMATCH Integral Linearity Error Gain Error1 Bipolar Zero Error1 ANALOG OUTPUTS Full-Scale Range (FSR) Output Current Short Circuit Limit Current Max VDD, VSS IDD, ISS 610.8 TMIN, TMAX 0 –65 ±5 5.00 ± 15 5.0 5.0 5.03 ± 25 5.5 3.0 V ppm/°C mA V mA ± 15 ± 15 625 625 ppm of FSR/% ppm of FSR/% ± 12 ± 25 613.2 630 V mA +70 +150 °C °C NOTES 1 Gain and bipolar zero errors are measured using internal voltage reference and include its errors. 2 Digital crosstalk is defined as the change in any one output’s steady state value as a result of any other output being driven from VOUTMIN to VOUTMAX into a 2 kΩ || 500 pF load by means of varying the digital input code. 3 The internal voltage reference is intended to drive on-chip only; buffer it if using it externally. 4 All minimum and maximum specifications are guaranteed, and specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. Specifications subject to change without notice. –2– REV. A AD75004 TIMING CHARACTERISTICS1 TRUTH TABLE (TA = +258C, 612.0 V power supplies unless otherwise noted) Parameter Symbol Min Units Address Setup Time Address Hold Time Data Setup Time Data Hold Time Chip Select to Write Setup Time Write to Chip Select Hold Time Write Pulse Width t1 t2 t3 t4 t5 t6 t7 30 10 10 45 0 0 50 ns ns ns ns ns ns ns Operation 1 X 0 0 0 0 No operation No operation 8 LSBs → one input latch 4 MSBs → one input latch Update one DAC latch Update all 4 DAC latches X 1 0 0 0 0 X X 0 0 1 1 X X 0 1 0 1 X X A1* A1* A1* X X X A0* A0* A0* X NOTE *The A1 and A0 inputs specify the relevant channel. NOTES 1 Timing measurement reference level is 1.5 V. Specifications subject to change without notice ADDRESS INPUTS (A0–A3) t2 t1 DATA INPUTS (D0–D7) t3 CHIP SELECT (CS) WRITE (WR) Control and Address Lines CS WR A3 A2 A1 A0 t4 A1 A0 Channel 0 0 1 1 0 1 0 1 0 1 2 3 t6 t5 t7 ABSOLUTE MAXIMUM RATINGS* (TA = +25°C unless otherwise noted) VDD to DGND VSS to DGND VDD to VSS VREFIN to AGND Digital Inputs to DGND AGND to DGND Short to AGND on Analog Outputs Power Dissipation Specification Temperature Range Storage Temperature Lead Temperature Min Max Units –0.3 –18 –0.3 –0.3 –0.3 –0.3 +18 +0.3 +26.4 VDD VDD +0.3 Indefinite 1.0 +70 +150 +300 V V V V V V sec W °C °C °C 0 –65 Conditions TA ≤ 75°C Soldering, 10 seconds *Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD75004 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. ORDERING GUIDE Model Temperature Range Package Option* AD75004KN AD75004KP 0°C to +70°C 0°C to +70°C N-24A P-28A *N = Plastic DIP; P = Plastic Leaded Chip Carrier. REV. A –3– WARNING! ESD SENSITIVE DEVICE AD75004 PIN DESCRIPTIONS 24 V DD Data Input Bit 7 Data Input Bit 6 Data Input Bit 5 Data Input Bit 4 Data Input Bit 3 or 11 (MSB) Data Input Bit 2 or 10 Data Input Bit 1 or 9 Data Input Bit 0 (LSB) or 8 Chip Select Input; Active Low Write Input; Active Low Address Input Bit 3 (MSB) Address Input Bit 2 Address Input Bit 1 Address Input Bit 0 (LSB) Digital Ground Analog Ground –12 V Power Supply +5 V Reference Output Reference Input Analog Output 0 Analog Output 1 Analog Output 2 Analog Output 3 +12 V Power Supply No Internal Connection No Internal Connection No Internal Connection No Internal Connection 2 23 V OUT3 5 20 V OUT0 AD75004KN 6 TOP VIEW (Not to Scale) D1 7 19 V REFIN 18 V REFOUT D0 8 17 V SS CS 9 16 AGND WR 10 15 DGND A3 11 14 A0 A2 12 13 A1 D4 5 D3 6 D2 7 NC 8 D1 9 2 1 28 VOUT2 3 VOUT3 4 V DD D6 28-Pin PLCC 27 26 25 NC 24 VOUT1 AD75004KP 23 VOUT0 22 VREFIN TOP VIEW (Not to Scale) 21 VREFOUT D0 10 20 VSS CS 11 19 NC 12 13 14 15 16 17 18 DGND LSB 1111 0001 0000 1111 0000 D3 A0 (2047/2048) * VREFIN (1/2048) * VREFIN 0V – (1/2048) * VREFIN –VREFIN 1111 0000 0000 1111 0000 21 V OUT1 A2 MSB 0111 0000 0000 1111 1000 22 V OUT2 4 A1 Analog Output Voltage 3 D4 D2 BINARY CODE TABLE Twos Complement Value in DAC Latch D5 C1389a–5–10/91 1 D6 D7 D7 D6 D5 D4 D3 D2 D1 D0 CS WR A3 A2 A1 A0 DGND AGND VSS VREFOUT VREFIN VOUT0 VOUT1 VOUT2 VOUT3 VDD NC NC NC NC D7 D5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 – – – – Description A3 Name WR 1 2 3 5 6 7 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24 26 27 28 4 8 12 25 Plastic DIP Pin NC PLCC Pin PIN CONFIGURATIONS 24-Pin Plastic DIP NC = NO CONNECT AGND OUTLINE DIMENSIONS Plastic DIP (N-24A) PLCC (P-28A) 1.290 (32.77) 1.150 (29.21) 24 0.048 (1.21) 0.042 (1.07) 13 0.55 (13.97) 0.53 (13.47) 1 0.2 (5.08) MAX 0.175 (4.45) 0.12 (3.05) 0.048 (1.21) 0.042 (1.07) 4 5 PIN 1 IDENTIFIER 12 PIN 1 0.060 (1.52) 0.015 (0.38) 0.606 (15.4) 0.594 (15.09) 0.065 (1.66) SEATING 0.45 (1.15) PLANE 0.180 (4.57) 0.165 (4.19) 0.056 (1.42) 0.042 (1.07) 11 12 0.012 (0.305) 0.008 (0.203) –4– 0.021 (0.53) 0.013 (0.33) 0.050 (1.27) BSC (PINS DOWN) 0.020 (0.50) R 0.025 (0.63) 0.015 (0.38) 26 25 TOP VIEW 0.16 (4.07) 0.14 (3.56) 0.150 (3.81) MIN 0.02 (0.508) 0.100 0.015 (0.381) (2.54) BSC PRINTED IN U.S.A. Dimensions shown in inches and (mm). 0.032 (0.81) 0.026 (0.66) 19 18 0.456 (11.58) SQ 0.450 (11.43) 0.495 (12.57) SQ 0.485 (12.32) 0.430 (10.92) 0.390 (9.91) 0.040 (1.01) 0.025 (0.64) 0.110 (2.79) 0.085 (2.16) REV. A